Regenerative furnace



N-ovv 20a H. BANGERT ETAL REGENERATIVE EURNAGE Filed Dec, so, 1927Lam-913 4 Sheets-Sheet 1 REGEHERATIVE FURNAGE Filed Dec. 30, 1927 4Sheets-Sheet 2 Il l INVENTORJ)` ATTORNEY Nov. 20, 1928. l l 1,691,913

H. BANGERT E-r Al.

REGENERATIVE FURNAGE Filed Dec, 30, 1927 4 Sheets-Sheet 1 A o 26 y /`297 I me' l 28 A TTORNEY Pasenaa Nov. 20,1928.-

Y UNITED STATES I innen 'grafi-'sur r-rres.'vv

BEGENERATIVE FUBNACE.

Application :Bled December 80, 1927, serial No. 248,539, and GermanyJanuary 2o, 1833.

Our invention relates to improvements in;

regenerative furnaces. Burners for regenerative furnaces such as are nowin. use are sub'- iect to rapid wear because' the direction of the 5flameA is changed when changing over from one regenerator to the otherone, so that the parts of the burner, and more particularly .the mouththereof are exposed to changing temperatures, which causes rapiddestruction of the brick work. The object of the improvements is toprovide a burner in which the wear is reduced, 'and with this object inview our invention consists inconstructng the burner so that thedirectionof the flame is not changed when changing from one regeneratorto the other one, and in which therefore the molth, of the burner isalways exposed to the same temperature. In carrying out the invention weprovide the burner with two passages for alternately supplying the gasandconducting the heat to the regenerator chambers, and an air intakepassage, the said passages being so disposed relatively to one anotherthat only the gates controlling the regenerator chambers must be set forsupplyin the gas to the burner from one chamber or t e other.v v

For the urpose of explaining the invention severa? examples embodyingthe same have been shown in the accompanyingdrawings in which the samereference characters have beenused in all the views to indicatecorresponding parts. 1n said drawings,

Fig.' l, is a sectional elevation of the fur-i nace taken on the line 1-1 of Fig. 2,

Figs. 2 and 3, are sectional plan views 'taken' on the line -2-.42 ofFig. 1 and showing Y the burner connected respectively with one or d theother .o the 'regenerator chambers,

Fig. 4, is a sectional lan view taken on the lined-1 of Fig. 1 anshowing the passage for supplying the air, Figo. "s a sectional'planview similar to the oneillustrated in Figs. 2 and 3 and showina burnerprovided w1th a single mouth, ig. 6, is a sectional elevation taken onthe line 6-6 of Fig. :7 and illustrating a modification of the burner,'and -f Fig. 7 is a top planview of Fig. 6. 5c

furnace vcomprises a heating chamber 7 and a regenerator. 8 comprisingtwo chambers- `thesaid chambers In the example shown in Figs; 1 to 4,the' adapted to communicate through passages 9 l either with the supplyof gas or'with a stack,

eing connected with the furnace through vertical passages 10 and 11formed atthelr top ends with horizontal pasvthe intake end the furnaceis divided by vertical partitions 14 into four passages 15'. Thepassages 17, 18,13 and 15 provide the multile burner of the furnace. As*appears from lsages 17, 18. In the example shown in the I ils. 1 and 2,the said passa es meet at pdints I in 'cated in Figs. 2 and 4 y thereference character 16, and the passages 17, 18 and 15 are disposed atangles of about 120, the said angles having been indicatedin Fig. 2 bythe referencecharacter w.

ln Figs. 2 and 3 we have indicated the dow .of the gases through theburner.. lAs shown in Fig., 2,' theregenerator chamberconnected with thepass es 11 is onnected with the supply of gas, t e said gas being heatedwithin the regenerator chamber kand owing up' wardly through thepassages 11. At the top endof the said passages the currents ont gas aredivided each into two branches one dowing to the right and the other tothe left through the passages 17 and 18, 'and each branchcurrent isagain divided into two branches, the main portion owing through one ofthe passages 15,-v and the other art owingthrougha assagel and to oneothe passages 10. At t e po1nt16 air for supporting combustion is admixedto the gas, which air hows downwardly through the passages 13. Theproducts of combustion dowingl thiough the passa es 15 are used forheating the furnace, and t owingdownwardly hrough the'passalges 10 areused for heating the second regenerator. After the said secondregenerator has been heated, and the -rst-named re ngeratorthrough'which so tar the as has een supplied to the furnace has coo eded, the re en erators are reversed, whereupon the gas ows *upwardlylthrough the passages 10, and ortons of the `roducts of combustion owdownwardly ough the passages` 11. Igt

e products' of combustion will be understood that in both cases the iowsages and 11. .But we wish it to be understood that our invention is notlimited ,to this feature. Thus, Fig. v5 shows a burner having a singlepassage 15 connected with two vertical passages 10 and 11 adapted to bealternately connected to both regenerators. Otherwise the constructionof the furnace is the same as has been described with reference to Figs.1 to 4, and the same letters' of reference have been used to indicatecorresponding parts. 4

In he example so far described the passages 15,17 and 18 are disposedina horizontal plane. In Figs. 6 and 7 we have shown a modification inwhich-the. said passages are i communicating through vertical passages23 disposed -in la vertical plane, As shown in the said figures, thefurnace 20 is provided with two-regenerator chambers 21 and 22 and 24with the vburner of the furnace.. As'

shown, the said burner comprises a chamber 26 communicating with thefurnace 20 through passages-.27'.l The passages 23 open into thesaid'chamber at the bottom thereof,

and the passages 24 are formed at their ,top

ends with laterally directed portions 28 open-v in into the chamber atthe rear thereof. Af ve the chamber 26 there is a transverse passage 29communicating through vertical passages-30 with a supply of air.

As shown in Fig. 6, the as flows upwardly from the regenerator cham r 21through the passage 23, and it is mixed with air within I the chamber26. The main part of the prodl uctslof combustion Hows to the left landthrough the passages27, while the remain.-

mg part iows downwardly through the pas- .'.sage 24 and thevrcgenerator4 chamber 22.

After reversing the regenerator chambers, the gas ows upwardly throughthe 'passage 24, and, after being mixed with'air, it is divided' intotwo branch, currents one owing down-- v wardly through the passa e 23and the, re-

. enerator chamber 21 and .t e other one flowmg through the passages27'.

Also in this case the products of combustion iow through the passages 27of the burner in the same' direction whether the gas is supplied fromregenerator chamber 21 or 22.

'The passages 15, 17 and 18 or 23, 28 and 27 may be disposed atvdifferent angular positions, provided thatl the passages are disposedso that the current of gas can be divided-into 'branch currents oneflowing through the furnace and-theother to one of the'regeneratorchambers, and that the air is thoroughly a'dmixed tofthe gas. The amountof gas flowing the one o to the regenerator chamber to be heated issmaller than the amount of gas flowing through the furnace. Thereforethe angle included between the passages 17 and 18 may be smaller thanvIn the examples illus- 1. A regenerative furnace having two pas- Ysages for alternate communication with a source of gas VSupply and witha stack and connected with separate regenerator chambers, a burnerpassage communicating with the furnace, and a passage for supplying air,

all the said passages meeting at a common air ,and gas mixing andmixture ignitionpoint and thethree first-named passages being so4relatively arranged. as to eiect a division of the products ofcombustion into two portions suppliedrespectively the burner passage andthat passage of the first-named i se which at the time communicates withthe stack. v

2. A' regenerative furnace having two assages for alternatecommunication w-i source o f gas supply and with a stack and connectedwith-'separate regenerator cha'mbers, aburner passage communicating withthe furnace, and a' passage for supplying air, all the said passagesmeeting within the burner at a common air and gas mixing :md

ignition' point, the saidv passages communieating with thereneratorvchambers and Athe furnace being disposed substantially at products ofcombustion into streams respectively sup lied to the burner p an to fpthe pair of passages which at the time being communicates with thestack.

3. In a burner according to claim`1, the feature that the said airsupplying passage and the passages communicating with the regeneratorchambers'open into a subdivided angles of 120 so as to cause division ofthe Y ine.

ilo

chamber forming a multiple furnace burner. Y 4. A regenerative furnacehaving two regenerator chambers, sets of alternatingrinarrangement witheach other andcommunicating respectively with the jrespectiveregenerator chambers, said sets of passages being designed forconnection alter- Y nately with a source of gas sup ly and a stack, 'aburner passageleading'n t e furnace,I

the stack. 'Y

5. In a. regenerative furnace, a furnace seiiof chamber, two regeneratorchambers, a

said paages inte at a common point, vand baies a to deflectV portions of-sages servingalternately as fuel supply -pas-V vsages for the furnaceand heating flues for the regenerators, aA burner passage'between -said`sets of passages and the furnace chamber, said burner passage beingsubdivided -nto a plurality .of passages staggered with relationto'thezsets df regenerator chamber" passages and each communicating atan angle iwith 'a passage leading each yregeneraizor chamber, and meansfor conducting air for mixture with the gas 'at the points of'connecvtion of the burner passages with the generator chamberpassagges,4 Y

testimony whereof we aix jour signatures.

` HEINRICH BANGERT, I AGUS'IAV*HUHlSL-

